Wastegate reference ?
09-06-2009, 04:04 PM
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Wastegate reference ? Where are you guys referencing your wastegate off of? I was using the turbo fitting but was only making 4lbs of boost... I then switched to the evap port on the intake... fixed boost problem but im reading now the wastegate should not see vaccume??? should I move the reference point of the wastegate to the emissions port on the throttly body or is the port on the intake okay??
09-06-2009, 04:13 PM
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I have never seen an issue with a waste gate getting a vacuum signal and have used everything from turbo outlets to intercooler piping to intakes for my signal source.
09-06-2009, 06:17 PM
#5
I run my wastegate off the port on the turbo housing. BOV goes to the manifold vacuum.
Just to be clear. There are 2 ports on the wastegate. If you are not running a controller, you should be in the lower vacuum port and the one on top should be vented to atmosphere. After re reading your problem, it seems like you may be using the wrong port on the wastegate. If you think about how it works, the strongest boost signal will come from the compressor housing and assists the spring in keeping the valve shut.
Just to be clear. There are 2 ports on the wastegate. If you are not running a controller, you should be in the lower vacuum port and the one on top should be vented to atmosphere. After re reading your problem, it seems like you may be using the wrong port on the wastegate. If you think about how it works, the strongest boost signal will come from the compressor housing and assists the spring in keeping the valve shut.
Last edited by 98Z28CobraKiller; 09-06-2009 at 06:22 PM.
09-07-2009, 08:08 AM
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I run my wastegate off the port on the turbo housing. BOV goes to the manifold vacuum.
Just to be clear. There are 2 ports on the wastegate. If you are not running a controller, you should be in the lower vacuum port and the one on top should be vented to atmosphere. After re reading your problem, it seems like you may be using the wrong port on the wastegate. If you think about how it works, the strongest boost signal will come from the compressor housing and assists the spring in keeping the valve shut.
Just to be clear. There are 2 ports on the wastegate. If you are not running a controller, you should be in the lower vacuum port and the one on top should be vented to atmosphere. After re reading your problem, it seems like you may be using the wrong port on the wastegate. If you think about how it works, the strongest boost signal will come from the compressor housing and assists the spring in keeping the valve shut.
09-07-2009, 08:48 AM
#7
I run my wastegate off the port on the turbo housing. BOV goes to the manifold vacuum.
Just to be clear. There are 2 ports on the wastegate. If you are not running a controller, you should be in the lower vacuum port and the one on top should be vented to atmosphere. After re reading your problem, it seems like you may be using the wrong port on the wastegate. If you think about how it works, the strongest boost signal will come from the compressor housing and assists the spring in keeping the valve shut.
Just to be clear. There are 2 ports on the wastegate. If you are not running a controller, you should be in the lower vacuum port and the one on top should be vented to atmosphere. After re reading your problem, it seems like you may be using the wrong port on the wastegate. If you think about how it works, the strongest boost signal will come from the compressor housing and assists the spring in keeping the valve shut.
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09-07-2009, 02:26 PM
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I run my wastegate off the port on the turbo housing. BOV goes to the manifold vacuum.
Just to be clear. There are 2 ports on the wastegate. If you are not running a controller, you should be in the lower vacuum port and the one on top should be vented to atmosphere. After re reading your problem, it seems like you may be using the wrong port on the wastegate. If you think about how it works, the strongest boost signal will come from the compressor housing and assists the spring in keeping the valve shut.
Just to be clear. There are 2 ports on the wastegate. If you are not running a controller, you should be in the lower vacuum port and the one on top should be vented to atmosphere. After re reading your problem, it seems like you may be using the wrong port on the wastegate. If you think about how it works, the strongest boost signal will come from the compressor housing and assists the spring in keeping the valve shut.
Its in the right port... That was my first thought when the car would only make 4psi... When I switched to the reference being off the intake boost is now around 7psi... If the wastegate is not supposed to see vac should I just get a boost controller and reference it off the turbo port? Or would maybe welding a fitting onto the cold side right before the throttle body be the best bet??
Last edited by 2002RamAir; 09-07-2009 at 02:28 PM. Reason: add
09-07-2009, 05:07 PM
#9
Its in the right port... That was my first thought when the car would only make 4psi... When I switched to the reference being off the intake boost is now around 7psi... If the wastegate is not supposed to see vac should I just get a boost controller and reference it off the turbo port? Or would maybe welding a fitting onto the cold side right before the throttle body be the best bet??
09-08-2009, 07:43 AM
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The thing I dont understand is how the wastegate has a 7psi spring in it... When it is referenced off the turbo it would only hit at most 5psi then start to drop down to around 4psi... When I switched to the intake manifold to reference it everything was fixed... Is hitting 6-7psi and holding
09-08-2009, 01:35 PM
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The thing I dont understand is how the wastegate has a 7psi spring in it... When it is referenced off the turbo it would only hit at most 5psi then start to drop down to around 4psi... When I switched to the intake manifold to reference it everything was fixed... Is hitting 6-7psi and holding
09-08-2009, 02:20 PM
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True! and I have ran several references from the manifold with and without boost controllers, never seen it cause a problem with any parts but if you think your spring is a little strong and you are getting creep or spikes it might be worth it to try it at the turbo outlet to get the stronger signal, if that don't fix it, you might need a bigger gate.
09-09-2009, 06:56 AM
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09-09-2009, 07:45 AM
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The only issue that I see is when you go from 100% throttle to 0% throttle at the end of a pass. The sudden switch from boost to vacuum would slam the valve shut which causes the BOV to work harder at relieving the charge pressure. At the very least it will make that obnoxious srt4 blow off sound.